/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string | null}
 */
export function parseTime(time, cFormat) {
  if (arguments.length === 0 || !time) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string')) {
      if ((/^[0-9]+$/.test(time))) {
        // support "1548221490638"
        time = parseInt(time)
      } else {
        // support safari
        // https://stackoverflow.com/questions/4310953/invalid-date-in-safari
        time = time.replace(new RegExp(/-/gm), '/')
      }
    }

    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{([ymdhisa])+}/g, (result, key) => {
    const value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value ] }
    return value.toString().padStart(2, '0')
  })
  return time_str
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime(time) {
  if (('' + time).length === 10) {
    time = parseInt(time) * 1000
  } else {
    time = +time
  }
  const d = new Date(time)
  const now = Date.now()

  const diff = (now - d) / 1000

  if (diff < 30) {
    return '刚刚'
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + '分钟前'
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前'
  } else if (diff < 3600 * 24 * 2) {
    return '1天前'
  }
  if (option) {
    return parseTime(time, option)
  } else {
    return (
      d.getMonth() +
      1 +
      '月' +
      d.getDate() +
      '日' +
      d.getHours() +
      '时' +
      d.getMinutes() +
      '分'
    )
  }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj(url) {
  const search = decodeURIComponent(url.split('?')[1]).replace(/\+/g, ' ')
  if (!search) {
    return {}
  }
  const obj = {}
  const searchArr = search.split('&')
  searchArr.forEach(v => {
    const index = v.indexOf('=')
    if (index !== -1) {
      const name = v.substring(0, index)
      const val = v.substring(index + 1, v.length)
      obj[name] = val
    }
  })
  return obj
}

// 获取对应格式日期
export function nowTime(pattern) { // 获取当前时间
  var now = new Date()
  var year = now.getFullYear() // 年
  var month = now.getMonth() + 1 // 月
  var lastMonth = now.getMonth() // 上月
  var day = now.getDate() // 日
  var hh = now.getHours() // 时
  var mm = now.getMinutes() // 分
  var ss = now.getSeconds() // 秒
  if (month < 10) {
    month = '0' + month
  }
  if (lastMonth < 10) {
    lastMonth = '0' + lastMonth
  }
  if (day < 10) {
    day = '0' + day
  }
  if (hh < 10) {
    hh = '0' + hh
  }
  if (mm < 10) {
    mm = '0' + mm
  }
  if (ss < 10) {
    ss = '0' + ss
  }
  if (pattern === 'time') {
    return hh + ':' + mm + ':' + ss // 获取当前时间
  } else if (pattern === 'year') {
    return year // 获取当前年份
  } else if (pattern === 'month') {
    return month // 获取当前月份
  } else if (pattern === 'yearMonth') {
    return year + '-' + month // 获取当前月份
  } else if (pattern === 'YM') {
    return year + '-' + lastMonth // 获取当年上月
  } else if (pattern === 'date') {
    return year + '-' + month + '-' + day // 获取当前日期
  } else if (pattern === 'yesdate') {
    return year + '-' + month + '-' + (day-1) // 获取昨天日期
  } else if (pattern === 'allTime') {
    return year + '-' + month + '-' + day + ' ' + hh + ':' + mm + ':' + ss // 获取日期与时间
  }
}

// 两个时间相差天数
export function datedifference (sDate1, sDate2) { // sDate1和sDate2是2006-12-18格式
  var dateSpan, tempDate, iDays;
  sDate1 = Date.parse(sDate1);
  sDate2 = Date.parse(sDate2);
  dateSpan = sDate2 - sDate1;
  iDays = Math.floor(dateSpan / (24 * 3600 * 1000));
  return iDays
}